code: def get_augment_range_by_coverage(self, data):
      zone_start, zone_end = int(data.shape[1] * self.zone[0]), int(
          data.shape[1] * self.zone[1]
      )
      zone_size = zone_end - zone_start
  
      target_size = int(zone_size * self.coverage)
      last_start = zone_start + int(zone_size * (1 - self.coverage))
  
      if zone_start == last_start:
          start_pos = zone_start
          end_pos = zone_end
      else:
          start_pos = np.random.randint(zone_start, last_start)
          end_pos = start_pos + target_size
  
      return start_pos, end_pos
  
file_path: nlpaug/nlpaug/augmenter/spectrogram/spectrogram_augmenter.py
imports: import numpy
  from nlpaug.util import Method
  from nlpaug import Augmenter
label_desc: Use image node_id 5 for calling the SpectrogramAugmenter obj's underlying member method code with example usage: obj.get_augment_range_by_coverage(data) and returns: start_pos,  end_pos